* {{App|[[Wikipedia:Celestia|Celestia]]|A 3D astronomy simulation program that allows users to travel through an extensive universe, modeled after reality, at any speed, in any direction and at any time in history.|http://www.shatters.net/celestia/|{{Pkg|celestia}}}}

* {{App|[[Wikipedia:Celestia|Celestia]]|A 3D astronomy simulation program that allows users to travel through an extensive universe, modeled after reality, at any speed, in any direction and at any time in history.|http://www.shatters.net/celestia/|{{Pkg|celestia}}}}

* {{App|GoQat|A camera acquisition software, especially for QSI cameras, that provides other features such as autoguiding, focusing help and others.|http://canburytech.net/GoQat/|{{AUR|goqat}}}}

* {{App|[[Wikipedia:KStars|KStars]]|A planetarium application that provides an accurate graphical simulation of the night sky, from any location on Earth, at any date and time. It is included in KDE Edu.|http://edu.kde.org/kstars/|{{Pkg|kdeedu-kstars}}}}

* {{App|[[Wikipedia:KStars|KStars]]|A planetarium application that provides an accurate graphical simulation of the night sky, from any location on Earth, at any date and time. It is included in KDE Edu.|http://edu.kde.org/kstars/|{{Pkg|kdeedu-kstars}}}}

+

* {{App|Open PHD Guiding|A telescope autoguiding software based on the famous PHD Guiding.|http://code.google.com/p/open-phd-guiding/|{{AUR|open-phd-guiding}}}}

* {{App|[[Wikipedia:Cartes du Ciel|Skychart / Cartes Du Ciel]]|A planetarium that maps out and labels most of the constellations, planets, and objects you can see with a telescope. It can also download Digitized Sky Survey Charts and superimpose images over these charts.|http://www.ap-i.net/skychart/start/|{{AUR|skychart}}}}

* {{App|[[Wikipedia:Cartes du Ciel|Skychart / Cartes Du Ciel]]|A planetarium that maps out and labels most of the constellations, planets, and objects you can see with a telescope. It can also download Digitized Sky Survey Charts and superimpose images over these charts.|http://www.ap-i.net/skychart/start/|{{AUR|skychart}}}}

Computer Algebra System

Fermat — A computer algebra system that does arithmetic of arbitrarily long integers and fractions, multivariate polynomials, symbolic calculations, matrices over polynomial rings, graphics, and other numerical calculations.

FreeMat — A Matlab-like program that supports many of its functions and features a codeless interface to external C, C++, and Fortran code, further parallel distributed algorithm development (via MPI), and 3D visualization capabilities.

Chemistry and Biology

Computational Biology and Bioinformatics

BALL (Biochemical Algorithms Library) — An application framework in C++ that provides an extensive set of data structures as well as classes for molecular nechanics, advanced solvation methods, comparison and analysis of protein structures, file import/export, and visualization.

Quantum ESPRESSO — An integrated suite of applications for electronic-structure calculations and materials modeling at nanoscale. It is based on density-functional theory, plane waves, and pseudopotentials (both norm-conserving and ultrasoft).

Skychart / Cartes Du Ciel — A planetarium that maps out and labels most of the constellations, planets, and objects you can see with a telescope. It can also download Digitized Sky Survey Charts and superimpose images over these charts.

KTechLab — An IDE for electronic and PIC microcontroller circuit design and simulation featuring an extensive circuit designer with autorouting and simulation of all common electronic components and logic elements.